Exercise 9B
Question 1
1. A school library has 600 books out of which 540 books are fiction. What per cent of the books are fiction?
2. There are 24 girls in a class of 40 children. What percentage of children were girls?
3. Nikhil bought 5400 books in a month and sold 4050 books. What per cent of books he could not sell?
4.An author receives royalty at 712% of the selling price of the the first 5000 books; 10% of the selling price on the next 5,000 books; 1212% of the selling price on the rest of the sales. How much will he receive if 15,000 copies are sold at ₹80 each?
5.A Maruti car costing ₹2,50,000 dropped 23% in value of the first year. How much was it worth at the end of the year?
6. A 4 metre elastic band is increased by 10%. Find its new length.
7. The cost of a shirt is decreased by 1212% during sale. What is the new cost if it was 1500 rupees?
8. A library contains 800 reference books. New books are bought and the percentage increase in the number of books is 30%. How many books are there in the library now?
9. The price of an egg is increased from ₹4 to ₹5. What is the percentage increase?
10. An article was marked ₹150. Ali wants to purchase it for ₹138. How many per cent discount did Ali ask for?
11. Chalk contains 40% calcium, 12% carbon and rest oxygen. What is the amount oxygen in 8 kg of chalk?
12. There are 160 apples in a box. 15% of the apples got spoilt on them. How many good apples are there in the box?
13. A man spent 25% of his money on food, 55% on rent and transportation and the remaining 9000 , he saved. How much money did he have? Find the amount of money spent on rent and transportation?
14. In an examination, there were 640 boys and 360 girls. 60% of the boys and 80% of the girls were successful. How many in all failed?
Multiple Choice Question (MCQ)
Tick (✔) the correct option.
15. A batsman scored 140 runs which included 2 boundaries and 8 sixes. What per cent of his total score did he make by running between the wickets?
(a) 56%
(b) 60%
(c) 44%
(d) 40%
Solutions
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